Elijah b



E. B. TILDEN.

Ice-Cream Freezers.

Patented AugusAt12, 1873.

` lock the scraper to the bar C.

ELIJAH B. TILDEN, CF PRARIE CITY, IOWA.

EMPRGVEMENT IN ICE-CREAM FREEZERS.

Specification forming part of Letters Patent No. L'SQ, dated August 12,1573 5 application filed February l5, 1873.

To all whom it may concern:

Be it known that I, ELIJAH B. TILDEN, of Prairie City, in the county ofJasper and State of Iowa, have invented an IceCream Freezer, of whichthe following is a specification:

The object of my invention is to provide an ice-cream freezer of simplemechanism, that will agitate, cut, mix, and pack the ingredients bycentrifugal force. It consists in combining, arranging, and co-operating an ice-holder, cream-holder, scraper, and beater, in such a mannerthat during its operation the beater will be locked to the cream-holderand move therewith, while the scraper is at the same time heldstationary in the revolving creamholder, all as hereinafter fully setforth.

Figure 1 of my drawing is a miniature perspective view, which shows halfsections of the ice and cream holders, and illustrates the manner ofcombining and operating therewith the scraper and the beater.

A A is the ice-holder; it may vary inform, size, and material. B B isthe cream-holder, of cylindrical form, and varying in size to suitice-holders of various dimensions. C is a locking-bar, designed to lockthe scraper to the ice-holder. Any suitable catch or locking device maybe used to connect the'ends rigidly with the top edge of the vessel A. aa is the blade ofthe scraper, permanently attached te the tube b.- Thistube b passes over the shaft of the beater, andv serves as a key to ccis the shaft forming part of the beater. d d is the frame of thebeater, permanently attached to the shaft c c. l 2 3 4 is a series ofcutters or blades extending from the shaft to the frame. They are set atan angle of about thirty-five degrees, and on the one side in a reversedirection from the other. f is a catch of suitable form on the bottomend of the shaft c c, designed for coupling the beater to thepivotal-bearing g, which supports the vessel B on the pivot 7L in thecenter of the bottom of the vessel A. 7c k is a flange or rim on thebottom of the cream-holder. It prevents the vessel from resting on thepivotal bearing g when lifted out of the ice-holder, and serves as afoot or base upon which the vessel will stand perpendicular andindependent of support.

Fig. 2 is a sectional cover, hinged together in such a manner that itcan be put on and taken off from the cream-holder at any time withoutunfastening or removing any other part of the apparatus. It may beformed of wood or cast metal, with a tongue-and-groove joint to keep thecream secure and clean. When made of sheet metal, strips can be attachedto answer the .purposes of a tongueand-groove joint. A suitable claspwill hold the parts together and keep the cover in place.

To operate my freezer, place the creamholder B in the ice-holder A, insuch a manner that the bearing g will rest on the pivot h. Pass thekey-tube b of the scraper a over the shaft c, and then place thecombined scraper and beater in the vessel B, and fasten it thereto bymeans of the coupling devices f and g. Next, place the locking-bar Cover the shaft c, and allow the key part of the tube b to enter thecorresponding openin g or key-hole in the bar. Fasten the ends to thevessel A. You are now ready to lill the space between the two vesselswith the ice or con gealin g mixture, and the cream -holder with creamand eggs, or any other ingredients you may desire to mix and freeze.Cover the cream-holder, attach a crank to the shaft c, and turn rapidly.Any suitable gearing and power may be counected to do the turning. Theshaft c coupled to the bottom of the cream-holder causes the beater andcream-holder to move jointly and simultaneously in the same direction.The vessel A and scraper a, locked together by means of the bar C,remain stationary. The blade of the scraper inclines from the wall ofthe cream-holder toward the center, and turns and directs the liquidfrom the, out side toward the center. The liquid is thrown from thecenter to the circumference by centrifugal force, and all lumps come incontact with the scraper and are thereby broken. The same centrifugalforce throws the liquid continually from the center toward thecircumference, and at the same time causes a rotary movement that bringsit in contact with the series of horizontal cutters l 2 3 4. The fluidmatter is loose within the rotating vessel and ilies about, and isdirected and beat and mixed by coming in contact with the fixed scraperand fixed beater. As it congeals it loses its volatile action, andsettles toward the bottom. The scraper prevents it from adhering to thevessel and aids in packing the congealed mass into the bottom ready todish and serve.

I am aware that a stationary scraper has been combined with a rotatingbeater; but I claim as new and greatly 4advantageous the combination andarrangement which causes the beater to be stationary in thecream-holder, and to move j ointlytberewith, While the scraper is lockedto the ice-holder, and yet held rigidly and stationary Within thecream-holder, thereby causing the uid matter to fly about and strike thexed scraper and beater in the manner set forth.

I claim as my inventionl. The locking-bar C, in combination with theice-holder A and cream-holder B, substantially as described, and for thepurpose specied.

2. The locking-bar C, in combination with the tube-key b and scraper a,substantially as described, and for the purpose specied.

y 3. The locking-bar G, tube-key b, and scraper a, in combination withthe beater o d, having a series of cutters, 1, 2, 3, and 4,substantially as described, and for the purpose specified.

4. The coupling device f and g and pivot h, in combination With thebeater c d, substantially as described, and for the purpose specified.

ELIJAH B. TILDEN.

Witnesses:

JOHN G. BIDWELL, M. SHELDON.

